1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <inttypes.h> 4 #include <linux/kernel.h> 5 #include <linux/zalloc.h> 6 #include <traceevent/event-parse.h> 7 #include <api/fs/fs.h> 8 9 #include <byteswap.h> 10 #include <unistd.h> 11 #include <sys/types.h> 12 #include <sys/mman.h> 13 14 #include "evlist.h" 15 #include "evsel.h" 16 #include "memswap.h" 17 #include "map.h" 18 #include "symbol.h" 19 #include "session.h" 20 #include "tool.h" 21 #include "sort.h" 22 #include "cpumap.h" 23 #include "perf_regs.h" 24 #include "asm/bug.h" 25 #include "auxtrace.h" 26 #include "thread.h" 27 #include "thread-stack.h" 28 #include "sample-raw.h" 29 #include "stat.h" 30 #include "arch/common.h" 31 32 #ifdef HAVE_ZSTD_SUPPORT 33 static int perf_session__process_compressed_event(struct perf_session *session, 34 union perf_event *event, u64 file_offset) 35 { 36 void *src; 37 size_t decomp_size, src_size; 38 u64 decomp_last_rem = 0; 39 size_t decomp_len = session->header.env.comp_mmap_len; 40 struct decomp *decomp, *decomp_last = session->decomp_last; 41 42 decomp = mmap(NULL, sizeof(struct decomp) + decomp_len, PROT_READ|PROT_WRITE, 43 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 44 if (decomp == MAP_FAILED) { 45 pr_err("Couldn't allocate memory for decompression\n"); 46 return -1; 47 } 48 49 decomp->file_pos = file_offset; 50 decomp->head = 0; 51 52 if (decomp_last) { 53 decomp_last_rem = decomp_last->size - decomp_last->head; 54 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); 55 decomp->size = decomp_last_rem; 56 } 57 58 src = (void *)event + sizeof(struct compressed_event); 59 src_size = event->pack.header.size - sizeof(struct compressed_event); 60 61 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size, 62 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); 63 if (!decomp_size) { 64 munmap(decomp, sizeof(struct decomp) + decomp_len); 65 pr_err("Couldn't decompress data\n"); 66 return -1; 67 } 68 69 decomp->size += decomp_size; 70 71 if (session->decomp == NULL) { 72 session->decomp = decomp; 73 session->decomp_last = decomp; 74 } else { 75 session->decomp_last->next = decomp; 76 session->decomp_last = decomp; 77 } 78 79 pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size); 80 81 return 0; 82 } 83 #else /* !HAVE_ZSTD_SUPPORT */ 84 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub 85 #endif 86 87 static int perf_session__deliver_event(struct perf_session *session, 88 union perf_event *event, 89 struct perf_tool *tool, 90 u64 file_offset); 91 92 static int perf_session__open(struct perf_session *session) 93 { 94 struct perf_data *data = session->data; 95 96 if (perf_session__read_header(session) < 0) { 97 pr_err("incompatible file format (rerun with -v to learn more)\n"); 98 return -1; 99 } 100 101 if (perf_data__is_pipe(data)) 102 return 0; 103 104 if (perf_header__has_feat(&session->header, HEADER_STAT)) 105 return 0; 106 107 if (!perf_evlist__valid_sample_type(session->evlist)) { 108 pr_err("non matching sample_type\n"); 109 return -1; 110 } 111 112 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 113 pr_err("non matching sample_id_all\n"); 114 return -1; 115 } 116 117 if (!perf_evlist__valid_read_format(session->evlist)) { 118 pr_err("non matching read_format\n"); 119 return -1; 120 } 121 122 return 0; 123 } 124 125 void perf_session__set_id_hdr_size(struct perf_session *session) 126 { 127 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 128 129 machines__set_id_hdr_size(&session->machines, id_hdr_size); 130 } 131 132 int perf_session__create_kernel_maps(struct perf_session *session) 133 { 134 int ret = machine__create_kernel_maps(&session->machines.host); 135 136 if (ret >= 0) 137 ret = machines__create_guest_kernel_maps(&session->machines); 138 return ret; 139 } 140 141 static void perf_session__destroy_kernel_maps(struct perf_session *session) 142 { 143 machines__destroy_kernel_maps(&session->machines); 144 } 145 146 static bool perf_session__has_comm_exec(struct perf_session *session) 147 { 148 struct perf_evsel *evsel; 149 150 evlist__for_each_entry(session->evlist, evsel) { 151 if (evsel->attr.comm_exec) 152 return true; 153 } 154 155 return false; 156 } 157 158 static void perf_session__set_comm_exec(struct perf_session *session) 159 { 160 bool comm_exec = perf_session__has_comm_exec(session); 161 162 machines__set_comm_exec(&session->machines, comm_exec); 163 } 164 165 static int ordered_events__deliver_event(struct ordered_events *oe, 166 struct ordered_event *event) 167 { 168 struct perf_session *session = container_of(oe, struct perf_session, 169 ordered_events); 170 171 return perf_session__deliver_event(session, event->event, 172 session->tool, event->file_offset); 173 } 174 175 struct perf_session *perf_session__new(struct perf_data *data, 176 bool repipe, struct perf_tool *tool) 177 { 178 struct perf_session *session = zalloc(sizeof(*session)); 179 180 if (!session) 181 goto out; 182 183 session->repipe = repipe; 184 session->tool = tool; 185 INIT_LIST_HEAD(&session->auxtrace_index); 186 machines__init(&session->machines); 187 ordered_events__init(&session->ordered_events, 188 ordered_events__deliver_event, NULL); 189 190 perf_env__init(&session->header.env); 191 if (data) { 192 if (perf_data__open(data)) 193 goto out_delete; 194 195 session->data = data; 196 197 if (perf_data__is_read(data)) { 198 if (perf_session__open(session) < 0) 199 goto out_delete; 200 201 /* 202 * set session attributes that are present in perf.data 203 * but not in pipe-mode. 204 */ 205 if (!data->is_pipe) { 206 perf_session__set_id_hdr_size(session); 207 perf_session__set_comm_exec(session); 208 } 209 210 perf_evlist__init_trace_event_sample_raw(session->evlist); 211 212 /* Open the directory data. */ 213 if (data->is_dir && perf_data__open_dir(data)) 214 goto out_delete; 215 } 216 } else { 217 session->machines.host.env = &perf_env; 218 } 219 220 session->machines.host.single_address_space = 221 perf_env__single_address_space(session->machines.host.env); 222 223 if (!data || perf_data__is_write(data)) { 224 /* 225 * In O_RDONLY mode this will be performed when reading the 226 * kernel MMAP event, in perf_event__process_mmap(). 227 */ 228 if (perf_session__create_kernel_maps(session) < 0) 229 pr_warning("Cannot read kernel map\n"); 230 } 231 232 /* 233 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 234 * processed, so perf_evlist__sample_id_all is not meaningful here. 235 */ 236 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 237 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 238 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 239 tool->ordered_events = false; 240 } 241 242 return session; 243 244 out_delete: 245 perf_session__delete(session); 246 out: 247 return NULL; 248 } 249 250 static void perf_session__delete_threads(struct perf_session *session) 251 { 252 machine__delete_threads(&session->machines.host); 253 } 254 255 static void perf_session__release_decomp_events(struct perf_session *session) 256 { 257 struct decomp *next, *decomp; 258 size_t decomp_len; 259 next = session->decomp; 260 decomp_len = session->header.env.comp_mmap_len; 261 do { 262 decomp = next; 263 if (decomp == NULL) 264 break; 265 next = decomp->next; 266 munmap(decomp, decomp_len + sizeof(struct decomp)); 267 } while (1); 268 } 269 270 void perf_session__delete(struct perf_session *session) 271 { 272 if (session == NULL) 273 return; 274 auxtrace__free(session); 275 auxtrace_index__free(&session->auxtrace_index); 276 perf_session__destroy_kernel_maps(session); 277 perf_session__delete_threads(session); 278 perf_session__release_decomp_events(session); 279 perf_env__exit(&session->header.env); 280 machines__exit(&session->machines); 281 if (session->data) 282 perf_data__close(session->data); 283 free(session); 284 } 285 286 static int process_event_synth_tracing_data_stub(struct perf_session *session 287 __maybe_unused, 288 union perf_event *event 289 __maybe_unused) 290 { 291 dump_printf(": unhandled!\n"); 292 return 0; 293 } 294 295 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 296 union perf_event *event __maybe_unused, 297 struct perf_evlist **pevlist 298 __maybe_unused) 299 { 300 dump_printf(": unhandled!\n"); 301 return 0; 302 } 303 304 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 305 union perf_event *event __maybe_unused, 306 struct perf_evlist **pevlist 307 __maybe_unused) 308 { 309 if (dump_trace) 310 perf_event__fprintf_event_update(event, stdout); 311 312 dump_printf(": unhandled!\n"); 313 return 0; 314 } 315 316 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 317 union perf_event *event __maybe_unused, 318 struct perf_sample *sample __maybe_unused, 319 struct perf_evsel *evsel __maybe_unused, 320 struct machine *machine __maybe_unused) 321 { 322 dump_printf(": unhandled!\n"); 323 return 0; 324 } 325 326 static int process_event_stub(struct perf_tool *tool __maybe_unused, 327 union perf_event *event __maybe_unused, 328 struct perf_sample *sample __maybe_unused, 329 struct machine *machine __maybe_unused) 330 { 331 dump_printf(": unhandled!\n"); 332 return 0; 333 } 334 335 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 336 union perf_event *event __maybe_unused, 337 struct ordered_events *oe __maybe_unused) 338 { 339 dump_printf(": unhandled!\n"); 340 return 0; 341 } 342 343 static int process_finished_round(struct perf_tool *tool, 344 union perf_event *event, 345 struct ordered_events *oe); 346 347 static int skipn(int fd, off_t n) 348 { 349 char buf[4096]; 350 ssize_t ret; 351 352 while (n > 0) { 353 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 354 if (ret <= 0) 355 return ret; 356 n -= ret; 357 } 358 359 return 0; 360 } 361 362 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 363 union perf_event *event) 364 { 365 dump_printf(": unhandled!\n"); 366 if (perf_data__is_pipe(session->data)) 367 skipn(perf_data__fd(session->data), event->auxtrace.size); 368 return event->auxtrace.size; 369 } 370 371 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 372 union perf_event *event __maybe_unused) 373 { 374 dump_printf(": unhandled!\n"); 375 return 0; 376 } 377 378 379 static 380 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 381 union perf_event *event __maybe_unused) 382 { 383 if (dump_trace) 384 perf_event__fprintf_thread_map(event, stdout); 385 386 dump_printf(": unhandled!\n"); 387 return 0; 388 } 389 390 static 391 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 392 union perf_event *event __maybe_unused) 393 { 394 if (dump_trace) 395 perf_event__fprintf_cpu_map(event, stdout); 396 397 dump_printf(": unhandled!\n"); 398 return 0; 399 } 400 401 static 402 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 403 union perf_event *event __maybe_unused) 404 { 405 if (dump_trace) 406 perf_event__fprintf_stat_config(event, stdout); 407 408 dump_printf(": unhandled!\n"); 409 return 0; 410 } 411 412 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 413 union perf_event *event) 414 { 415 if (dump_trace) 416 perf_event__fprintf_stat(event, stdout); 417 418 dump_printf(": unhandled!\n"); 419 return 0; 420 } 421 422 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 423 union perf_event *event) 424 { 425 if (dump_trace) 426 perf_event__fprintf_stat_round(event, stdout); 427 428 dump_printf(": unhandled!\n"); 429 return 0; 430 } 431 432 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 433 union perf_event *event __maybe_unused, 434 u64 file_offset __maybe_unused) 435 { 436 dump_printf(": unhandled!\n"); 437 return 0; 438 } 439 440 void perf_tool__fill_defaults(struct perf_tool *tool) 441 { 442 if (tool->sample == NULL) 443 tool->sample = process_event_sample_stub; 444 if (tool->mmap == NULL) 445 tool->mmap = process_event_stub; 446 if (tool->mmap2 == NULL) 447 tool->mmap2 = process_event_stub; 448 if (tool->comm == NULL) 449 tool->comm = process_event_stub; 450 if (tool->namespaces == NULL) 451 tool->namespaces = process_event_stub; 452 if (tool->fork == NULL) 453 tool->fork = process_event_stub; 454 if (tool->exit == NULL) 455 tool->exit = process_event_stub; 456 if (tool->lost == NULL) 457 tool->lost = perf_event__process_lost; 458 if (tool->lost_samples == NULL) 459 tool->lost_samples = perf_event__process_lost_samples; 460 if (tool->aux == NULL) 461 tool->aux = perf_event__process_aux; 462 if (tool->itrace_start == NULL) 463 tool->itrace_start = perf_event__process_itrace_start; 464 if (tool->context_switch == NULL) 465 tool->context_switch = perf_event__process_switch; 466 if (tool->ksymbol == NULL) 467 tool->ksymbol = perf_event__process_ksymbol; 468 if (tool->bpf_event == NULL) 469 tool->bpf_event = perf_event__process_bpf_event; 470 if (tool->read == NULL) 471 tool->read = process_event_sample_stub; 472 if (tool->throttle == NULL) 473 tool->throttle = process_event_stub; 474 if (tool->unthrottle == NULL) 475 tool->unthrottle = process_event_stub; 476 if (tool->attr == NULL) 477 tool->attr = process_event_synth_attr_stub; 478 if (tool->event_update == NULL) 479 tool->event_update = process_event_synth_event_update_stub; 480 if (tool->tracing_data == NULL) 481 tool->tracing_data = process_event_synth_tracing_data_stub; 482 if (tool->build_id == NULL) 483 tool->build_id = process_event_op2_stub; 484 if (tool->finished_round == NULL) { 485 if (tool->ordered_events) 486 tool->finished_round = process_finished_round; 487 else 488 tool->finished_round = process_finished_round_stub; 489 } 490 if (tool->id_index == NULL) 491 tool->id_index = process_event_op2_stub; 492 if (tool->auxtrace_info == NULL) 493 tool->auxtrace_info = process_event_op2_stub; 494 if (tool->auxtrace == NULL) 495 tool->auxtrace = process_event_auxtrace_stub; 496 if (tool->auxtrace_error == NULL) 497 tool->auxtrace_error = process_event_op2_stub; 498 if (tool->thread_map == NULL) 499 tool->thread_map = process_event_thread_map_stub; 500 if (tool->cpu_map == NULL) 501 tool->cpu_map = process_event_cpu_map_stub; 502 if (tool->stat_config == NULL) 503 tool->stat_config = process_event_stat_config_stub; 504 if (tool->stat == NULL) 505 tool->stat = process_stat_stub; 506 if (tool->stat_round == NULL) 507 tool->stat_round = process_stat_round_stub; 508 if (tool->time_conv == NULL) 509 tool->time_conv = process_event_op2_stub; 510 if (tool->feature == NULL) 511 tool->feature = process_event_op2_stub; 512 if (tool->compressed == NULL) 513 tool->compressed = perf_session__process_compressed_event; 514 } 515 516 static void swap_sample_id_all(union perf_event *event, void *data) 517 { 518 void *end = (void *) event + event->header.size; 519 int size = end - data; 520 521 BUG_ON(size % sizeof(u64)); 522 mem_bswap_64(data, size); 523 } 524 525 static void perf_event__all64_swap(union perf_event *event, 526 bool sample_id_all __maybe_unused) 527 { 528 struct perf_event_header *hdr = &event->header; 529 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 530 } 531 532 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 533 { 534 event->comm.pid = bswap_32(event->comm.pid); 535 event->comm.tid = bswap_32(event->comm.tid); 536 537 if (sample_id_all) { 538 void *data = &event->comm.comm; 539 540 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 541 swap_sample_id_all(event, data); 542 } 543 } 544 545 static void perf_event__mmap_swap(union perf_event *event, 546 bool sample_id_all) 547 { 548 event->mmap.pid = bswap_32(event->mmap.pid); 549 event->mmap.tid = bswap_32(event->mmap.tid); 550 event->mmap.start = bswap_64(event->mmap.start); 551 event->mmap.len = bswap_64(event->mmap.len); 552 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 553 554 if (sample_id_all) { 555 void *data = &event->mmap.filename; 556 557 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 558 swap_sample_id_all(event, data); 559 } 560 } 561 562 static void perf_event__mmap2_swap(union perf_event *event, 563 bool sample_id_all) 564 { 565 event->mmap2.pid = bswap_32(event->mmap2.pid); 566 event->mmap2.tid = bswap_32(event->mmap2.tid); 567 event->mmap2.start = bswap_64(event->mmap2.start); 568 event->mmap2.len = bswap_64(event->mmap2.len); 569 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 570 event->mmap2.maj = bswap_32(event->mmap2.maj); 571 event->mmap2.min = bswap_32(event->mmap2.min); 572 event->mmap2.ino = bswap_64(event->mmap2.ino); 573 574 if (sample_id_all) { 575 void *data = &event->mmap2.filename; 576 577 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 578 swap_sample_id_all(event, data); 579 } 580 } 581 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 582 { 583 event->fork.pid = bswap_32(event->fork.pid); 584 event->fork.tid = bswap_32(event->fork.tid); 585 event->fork.ppid = bswap_32(event->fork.ppid); 586 event->fork.ptid = bswap_32(event->fork.ptid); 587 event->fork.time = bswap_64(event->fork.time); 588 589 if (sample_id_all) 590 swap_sample_id_all(event, &event->fork + 1); 591 } 592 593 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 594 { 595 event->read.pid = bswap_32(event->read.pid); 596 event->read.tid = bswap_32(event->read.tid); 597 event->read.value = bswap_64(event->read.value); 598 event->read.time_enabled = bswap_64(event->read.time_enabled); 599 event->read.time_running = bswap_64(event->read.time_running); 600 event->read.id = bswap_64(event->read.id); 601 602 if (sample_id_all) 603 swap_sample_id_all(event, &event->read + 1); 604 } 605 606 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 607 { 608 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 609 event->aux.aux_size = bswap_64(event->aux.aux_size); 610 event->aux.flags = bswap_64(event->aux.flags); 611 612 if (sample_id_all) 613 swap_sample_id_all(event, &event->aux + 1); 614 } 615 616 static void perf_event__itrace_start_swap(union perf_event *event, 617 bool sample_id_all) 618 { 619 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 620 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 621 622 if (sample_id_all) 623 swap_sample_id_all(event, &event->itrace_start + 1); 624 } 625 626 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 627 { 628 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 629 event->context_switch.next_prev_pid = 630 bswap_32(event->context_switch.next_prev_pid); 631 event->context_switch.next_prev_tid = 632 bswap_32(event->context_switch.next_prev_tid); 633 } 634 635 if (sample_id_all) 636 swap_sample_id_all(event, &event->context_switch + 1); 637 } 638 639 static void perf_event__throttle_swap(union perf_event *event, 640 bool sample_id_all) 641 { 642 event->throttle.time = bswap_64(event->throttle.time); 643 event->throttle.id = bswap_64(event->throttle.id); 644 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 645 646 if (sample_id_all) 647 swap_sample_id_all(event, &event->throttle + 1); 648 } 649 650 static void perf_event__namespaces_swap(union perf_event *event, 651 bool sample_id_all) 652 { 653 u64 i; 654 655 event->namespaces.pid = bswap_32(event->namespaces.pid); 656 event->namespaces.tid = bswap_32(event->namespaces.tid); 657 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 658 659 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 660 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 661 662 ns->dev = bswap_64(ns->dev); 663 ns->ino = bswap_64(ns->ino); 664 } 665 666 if (sample_id_all) 667 swap_sample_id_all(event, &event->namespaces.link_info[i]); 668 } 669 670 static u8 revbyte(u8 b) 671 { 672 int rev = (b >> 4) | ((b & 0xf) << 4); 673 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 674 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 675 return (u8) rev; 676 } 677 678 /* 679 * XXX this is hack in attempt to carry flags bitfield 680 * through endian village. ABI says: 681 * 682 * Bit-fields are allocated from right to left (least to most significant) 683 * on little-endian implementations and from left to right (most to least 684 * significant) on big-endian implementations. 685 * 686 * The above seems to be byte specific, so we need to reverse each 687 * byte of the bitfield. 'Internet' also says this might be implementation 688 * specific and we probably need proper fix and carry perf_event_attr 689 * bitfield flags in separate data file FEAT_ section. Thought this seems 690 * to work for now. 691 */ 692 static void swap_bitfield(u8 *p, unsigned len) 693 { 694 unsigned i; 695 696 for (i = 0; i < len; i++) { 697 *p = revbyte(*p); 698 p++; 699 } 700 } 701 702 /* exported for swapping attributes in file header */ 703 void perf_event__attr_swap(struct perf_event_attr *attr) 704 { 705 attr->type = bswap_32(attr->type); 706 attr->size = bswap_32(attr->size); 707 708 #define bswap_safe(f, n) \ 709 (attr->size > (offsetof(struct perf_event_attr, f) + \ 710 sizeof(attr->f) * (n))) 711 #define bswap_field(f, sz) \ 712 do { \ 713 if (bswap_safe(f, 0)) \ 714 attr->f = bswap_##sz(attr->f); \ 715 } while(0) 716 #define bswap_field_16(f) bswap_field(f, 16) 717 #define bswap_field_32(f) bswap_field(f, 32) 718 #define bswap_field_64(f) bswap_field(f, 64) 719 720 bswap_field_64(config); 721 bswap_field_64(sample_period); 722 bswap_field_64(sample_type); 723 bswap_field_64(read_format); 724 bswap_field_32(wakeup_events); 725 bswap_field_32(bp_type); 726 bswap_field_64(bp_addr); 727 bswap_field_64(bp_len); 728 bswap_field_64(branch_sample_type); 729 bswap_field_64(sample_regs_user); 730 bswap_field_32(sample_stack_user); 731 bswap_field_32(aux_watermark); 732 bswap_field_16(sample_max_stack); 733 734 /* 735 * After read_format are bitfields. Check read_format because 736 * we are unable to use offsetof on bitfield. 737 */ 738 if (bswap_safe(read_format, 1)) 739 swap_bitfield((u8 *) (&attr->read_format + 1), 740 sizeof(u64)); 741 #undef bswap_field_64 742 #undef bswap_field_32 743 #undef bswap_field 744 #undef bswap_safe 745 } 746 747 static void perf_event__hdr_attr_swap(union perf_event *event, 748 bool sample_id_all __maybe_unused) 749 { 750 size_t size; 751 752 perf_event__attr_swap(&event->attr.attr); 753 754 size = event->header.size; 755 size -= (void *)&event->attr.id - (void *)event; 756 mem_bswap_64(event->attr.id, size); 757 } 758 759 static void perf_event__event_update_swap(union perf_event *event, 760 bool sample_id_all __maybe_unused) 761 { 762 event->event_update.type = bswap_64(event->event_update.type); 763 event->event_update.id = bswap_64(event->event_update.id); 764 } 765 766 static void perf_event__event_type_swap(union perf_event *event, 767 bool sample_id_all __maybe_unused) 768 { 769 event->event_type.event_type.event_id = 770 bswap_64(event->event_type.event_type.event_id); 771 } 772 773 static void perf_event__tracing_data_swap(union perf_event *event, 774 bool sample_id_all __maybe_unused) 775 { 776 event->tracing_data.size = bswap_32(event->tracing_data.size); 777 } 778 779 static void perf_event__auxtrace_info_swap(union perf_event *event, 780 bool sample_id_all __maybe_unused) 781 { 782 size_t size; 783 784 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 785 786 size = event->header.size; 787 size -= (void *)&event->auxtrace_info.priv - (void *)event; 788 mem_bswap_64(event->auxtrace_info.priv, size); 789 } 790 791 static void perf_event__auxtrace_swap(union perf_event *event, 792 bool sample_id_all __maybe_unused) 793 { 794 event->auxtrace.size = bswap_64(event->auxtrace.size); 795 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 796 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 797 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 798 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 799 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 800 } 801 802 static void perf_event__auxtrace_error_swap(union perf_event *event, 803 bool sample_id_all __maybe_unused) 804 { 805 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 806 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 807 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 808 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 809 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 810 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 811 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 812 if (event->auxtrace_error.fmt) 813 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 814 } 815 816 static void perf_event__thread_map_swap(union perf_event *event, 817 bool sample_id_all __maybe_unused) 818 { 819 unsigned i; 820 821 event->thread_map.nr = bswap_64(event->thread_map.nr); 822 823 for (i = 0; i < event->thread_map.nr; i++) 824 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 825 } 826 827 static void perf_event__cpu_map_swap(union perf_event *event, 828 bool sample_id_all __maybe_unused) 829 { 830 struct cpu_map_data *data = &event->cpu_map.data; 831 struct cpu_map_entries *cpus; 832 struct cpu_map_mask *mask; 833 unsigned i; 834 835 data->type = bswap_64(data->type); 836 837 switch (data->type) { 838 case PERF_CPU_MAP__CPUS: 839 cpus = (struct cpu_map_entries *)data->data; 840 841 cpus->nr = bswap_16(cpus->nr); 842 843 for (i = 0; i < cpus->nr; i++) 844 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 845 break; 846 case PERF_CPU_MAP__MASK: 847 mask = (struct cpu_map_mask *) data->data; 848 849 mask->nr = bswap_16(mask->nr); 850 mask->long_size = bswap_16(mask->long_size); 851 852 switch (mask->long_size) { 853 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 854 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 855 default: 856 pr_err("cpu_map swap: unsupported long size\n"); 857 } 858 default: 859 break; 860 } 861 } 862 863 static void perf_event__stat_config_swap(union perf_event *event, 864 bool sample_id_all __maybe_unused) 865 { 866 u64 size; 867 868 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 869 size += 1; /* nr item itself */ 870 mem_bswap_64(&event->stat_config.nr, size); 871 } 872 873 static void perf_event__stat_swap(union perf_event *event, 874 bool sample_id_all __maybe_unused) 875 { 876 event->stat.id = bswap_64(event->stat.id); 877 event->stat.thread = bswap_32(event->stat.thread); 878 event->stat.cpu = bswap_32(event->stat.cpu); 879 event->stat.val = bswap_64(event->stat.val); 880 event->stat.ena = bswap_64(event->stat.ena); 881 event->stat.run = bswap_64(event->stat.run); 882 } 883 884 static void perf_event__stat_round_swap(union perf_event *event, 885 bool sample_id_all __maybe_unused) 886 { 887 event->stat_round.type = bswap_64(event->stat_round.type); 888 event->stat_round.time = bswap_64(event->stat_round.time); 889 } 890 891 typedef void (*perf_event__swap_op)(union perf_event *event, 892 bool sample_id_all); 893 894 static perf_event__swap_op perf_event__swap_ops[] = { 895 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 896 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 897 [PERF_RECORD_COMM] = perf_event__comm_swap, 898 [PERF_RECORD_FORK] = perf_event__task_swap, 899 [PERF_RECORD_EXIT] = perf_event__task_swap, 900 [PERF_RECORD_LOST] = perf_event__all64_swap, 901 [PERF_RECORD_READ] = perf_event__read_swap, 902 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 903 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 904 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 905 [PERF_RECORD_AUX] = perf_event__aux_swap, 906 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 907 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 908 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 909 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 910 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 911 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 912 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 913 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 914 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 915 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 916 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 917 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 918 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 919 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 920 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 921 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 922 [PERF_RECORD_STAT] = perf_event__stat_swap, 923 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 924 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 925 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 926 [PERF_RECORD_HEADER_MAX] = NULL, 927 }; 928 929 /* 930 * When perf record finishes a pass on every buffers, it records this pseudo 931 * event. 932 * We record the max timestamp t found in the pass n. 933 * Assuming these timestamps are monotonic across cpus, we know that if 934 * a buffer still has events with timestamps below t, they will be all 935 * available and then read in the pass n + 1. 936 * Hence when we start to read the pass n + 2, we can safely flush every 937 * events with timestamps below t. 938 * 939 * ============ PASS n ================= 940 * CPU 0 | CPU 1 941 * | 942 * cnt1 timestamps | cnt2 timestamps 943 * 1 | 2 944 * 2 | 3 945 * - | 4 <--- max recorded 946 * 947 * ============ PASS n + 1 ============== 948 * CPU 0 | CPU 1 949 * | 950 * cnt1 timestamps | cnt2 timestamps 951 * 3 | 5 952 * 4 | 6 953 * 5 | 7 <---- max recorded 954 * 955 * Flush every events below timestamp 4 956 * 957 * ============ PASS n + 2 ============== 958 * CPU 0 | CPU 1 959 * | 960 * cnt1 timestamps | cnt2 timestamps 961 * 6 | 8 962 * 7 | 9 963 * - | 10 964 * 965 * Flush every events below timestamp 7 966 * etc... 967 */ 968 static int process_finished_round(struct perf_tool *tool __maybe_unused, 969 union perf_event *event __maybe_unused, 970 struct ordered_events *oe) 971 { 972 if (dump_trace) 973 fprintf(stdout, "\n"); 974 return ordered_events__flush(oe, OE_FLUSH__ROUND); 975 } 976 977 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 978 u64 timestamp, u64 file_offset) 979 { 980 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 981 } 982 983 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 984 { 985 struct ip_callchain *callchain = sample->callchain; 986 struct branch_stack *lbr_stack = sample->branch_stack; 987 u64 kernel_callchain_nr = callchain->nr; 988 unsigned int i; 989 990 for (i = 0; i < kernel_callchain_nr; i++) { 991 if (callchain->ips[i] == PERF_CONTEXT_USER) 992 break; 993 } 994 995 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 996 u64 total_nr; 997 /* 998 * LBR callstack can only get user call chain, 999 * i is kernel call chain number, 1000 * 1 is PERF_CONTEXT_USER. 1001 * 1002 * The user call chain is stored in LBR registers. 1003 * LBR are pair registers. The caller is stored 1004 * in "from" register, while the callee is stored 1005 * in "to" register. 1006 * For example, there is a call stack 1007 * "A"->"B"->"C"->"D". 1008 * The LBR registers will recorde like 1009 * "C"->"D", "B"->"C", "A"->"B". 1010 * So only the first "to" register and all "from" 1011 * registers are needed to construct the whole stack. 1012 */ 1013 total_nr = i + 1 + lbr_stack->nr + 1; 1014 kernel_callchain_nr = i + 1; 1015 1016 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1017 1018 for (i = 0; i < kernel_callchain_nr; i++) 1019 printf("..... %2d: %016" PRIx64 "\n", 1020 i, callchain->ips[i]); 1021 1022 printf("..... %2d: %016" PRIx64 "\n", 1023 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 1024 for (i = 0; i < lbr_stack->nr; i++) 1025 printf("..... %2d: %016" PRIx64 "\n", 1026 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 1027 } 1028 } 1029 1030 static void callchain__printf(struct perf_evsel *evsel, 1031 struct perf_sample *sample) 1032 { 1033 unsigned int i; 1034 struct ip_callchain *callchain = sample->callchain; 1035 1036 if (perf_evsel__has_branch_callstack(evsel)) 1037 callchain__lbr_callstack_printf(sample); 1038 1039 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1040 1041 for (i = 0; i < callchain->nr; i++) 1042 printf("..... %2d: %016" PRIx64 "\n", 1043 i, callchain->ips[i]); 1044 } 1045 1046 static void branch_stack__printf(struct perf_sample *sample) 1047 { 1048 uint64_t i; 1049 1050 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 1051 1052 for (i = 0; i < sample->branch_stack->nr; i++) { 1053 struct branch_entry *e = &sample->branch_stack->entries[i]; 1054 1055 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1056 i, e->from, e->to, 1057 (unsigned short)e->flags.cycles, 1058 e->flags.mispred ? "M" : " ", 1059 e->flags.predicted ? "P" : " ", 1060 e->flags.abort ? "A" : " ", 1061 e->flags.in_tx ? "T" : " ", 1062 (unsigned)e->flags.reserved); 1063 } 1064 } 1065 1066 static void regs_dump__printf(u64 mask, u64 *regs) 1067 { 1068 unsigned rid, i = 0; 1069 1070 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1071 u64 val = regs[i++]; 1072 1073 printf(".... %-5s 0x%" PRIx64 "\n", 1074 perf_reg_name(rid), val); 1075 } 1076 } 1077 1078 static const char *regs_abi[] = { 1079 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1080 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1081 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1082 }; 1083 1084 static inline const char *regs_dump_abi(struct regs_dump *d) 1085 { 1086 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1087 return "unknown"; 1088 1089 return regs_abi[d->abi]; 1090 } 1091 1092 static void regs__printf(const char *type, struct regs_dump *regs) 1093 { 1094 u64 mask = regs->mask; 1095 1096 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1097 type, 1098 mask, 1099 regs_dump_abi(regs)); 1100 1101 regs_dump__printf(mask, regs->regs); 1102 } 1103 1104 static void regs_user__printf(struct perf_sample *sample) 1105 { 1106 struct regs_dump *user_regs = &sample->user_regs; 1107 1108 if (user_regs->regs) 1109 regs__printf("user", user_regs); 1110 } 1111 1112 static void regs_intr__printf(struct perf_sample *sample) 1113 { 1114 struct regs_dump *intr_regs = &sample->intr_regs; 1115 1116 if (intr_regs->regs) 1117 regs__printf("intr", intr_regs); 1118 } 1119 1120 static void stack_user__printf(struct stack_dump *dump) 1121 { 1122 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1123 dump->size, dump->offset); 1124 } 1125 1126 static void perf_evlist__print_tstamp(struct perf_evlist *evlist, 1127 union perf_event *event, 1128 struct perf_sample *sample) 1129 { 1130 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1131 1132 if (event->header.type != PERF_RECORD_SAMPLE && 1133 !perf_evlist__sample_id_all(evlist)) { 1134 fputs("-1 -1 ", stdout); 1135 return; 1136 } 1137 1138 if ((sample_type & PERF_SAMPLE_CPU)) 1139 printf("%u ", sample->cpu); 1140 1141 if (sample_type & PERF_SAMPLE_TIME) 1142 printf("%" PRIu64 " ", sample->time); 1143 } 1144 1145 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1146 { 1147 printf("... sample_read:\n"); 1148 1149 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1150 printf("...... time enabled %016" PRIx64 "\n", 1151 sample->read.time_enabled); 1152 1153 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1154 printf("...... time running %016" PRIx64 "\n", 1155 sample->read.time_running); 1156 1157 if (read_format & PERF_FORMAT_GROUP) { 1158 u64 i; 1159 1160 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1161 1162 for (i = 0; i < sample->read.group.nr; i++) { 1163 struct sample_read_value *value; 1164 1165 value = &sample->read.group.values[i]; 1166 printf("..... id %016" PRIx64 1167 ", value %016" PRIx64 "\n", 1168 value->id, value->value); 1169 } 1170 } else 1171 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1172 sample->read.one.id, sample->read.one.value); 1173 } 1174 1175 static void dump_event(struct perf_evlist *evlist, union perf_event *event, 1176 u64 file_offset, struct perf_sample *sample) 1177 { 1178 if (!dump_trace) 1179 return; 1180 1181 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1182 file_offset, event->header.size, event->header.type); 1183 1184 trace_event(event); 1185 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1186 evlist->trace_event_sample_raw(evlist, event, sample); 1187 1188 if (sample) 1189 perf_evlist__print_tstamp(evlist, event, sample); 1190 1191 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1192 event->header.size, perf_event__name(event->header.type)); 1193 } 1194 1195 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 1196 struct perf_sample *sample) 1197 { 1198 u64 sample_type; 1199 1200 if (!dump_trace) 1201 return; 1202 1203 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1204 event->header.misc, sample->pid, sample->tid, sample->ip, 1205 sample->period, sample->addr); 1206 1207 sample_type = evsel->attr.sample_type; 1208 1209 if (evsel__has_callchain(evsel)) 1210 callchain__printf(evsel, sample); 1211 1212 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) 1213 branch_stack__printf(sample); 1214 1215 if (sample_type & PERF_SAMPLE_REGS_USER) 1216 regs_user__printf(sample); 1217 1218 if (sample_type & PERF_SAMPLE_REGS_INTR) 1219 regs_intr__printf(sample); 1220 1221 if (sample_type & PERF_SAMPLE_STACK_USER) 1222 stack_user__printf(&sample->user_stack); 1223 1224 if (sample_type & PERF_SAMPLE_WEIGHT) 1225 printf("... weight: %" PRIu64 "\n", sample->weight); 1226 1227 if (sample_type & PERF_SAMPLE_DATA_SRC) 1228 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1229 1230 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1231 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1232 1233 if (sample_type & PERF_SAMPLE_TRANSACTION) 1234 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1235 1236 if (sample_type & PERF_SAMPLE_READ) 1237 sample_read__printf(sample, evsel->attr.read_format); 1238 } 1239 1240 static void dump_read(struct perf_evsel *evsel, union perf_event *event) 1241 { 1242 struct read_event *read_event = &event->read; 1243 u64 read_format; 1244 1245 if (!dump_trace) 1246 return; 1247 1248 printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid, 1249 perf_evsel__name(evsel), 1250 event->read.value); 1251 1252 if (!evsel) 1253 return; 1254 1255 read_format = evsel->attr.read_format; 1256 1257 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1258 printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled); 1259 1260 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1261 printf("... time running : %" PRIu64 "\n", read_event->time_running); 1262 1263 if (read_format & PERF_FORMAT_ID) 1264 printf("... id : %" PRIu64 "\n", read_event->id); 1265 } 1266 1267 static struct machine *machines__find_for_cpumode(struct machines *machines, 1268 union perf_event *event, 1269 struct perf_sample *sample) 1270 { 1271 struct machine *machine; 1272 1273 if (perf_guest && 1274 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1275 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1276 u32 pid; 1277 1278 if (event->header.type == PERF_RECORD_MMAP 1279 || event->header.type == PERF_RECORD_MMAP2) 1280 pid = event->mmap.pid; 1281 else 1282 pid = sample->pid; 1283 1284 machine = machines__find(machines, pid); 1285 if (!machine) 1286 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1287 return machine; 1288 } 1289 1290 return &machines->host; 1291 } 1292 1293 static int deliver_sample_value(struct perf_evlist *evlist, 1294 struct perf_tool *tool, 1295 union perf_event *event, 1296 struct perf_sample *sample, 1297 struct sample_read_value *v, 1298 struct machine *machine) 1299 { 1300 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1301 1302 if (sid) { 1303 sample->id = v->id; 1304 sample->period = v->value - sid->period; 1305 sid->period = v->value; 1306 } 1307 1308 if (!sid || sid->evsel == NULL) { 1309 ++evlist->stats.nr_unknown_id; 1310 return 0; 1311 } 1312 1313 /* 1314 * There's no reason to deliver sample 1315 * for zero period, bail out. 1316 */ 1317 if (!sample->period) 1318 return 0; 1319 1320 return tool->sample(tool, event, sample, sid->evsel, machine); 1321 } 1322 1323 static int deliver_sample_group(struct perf_evlist *evlist, 1324 struct perf_tool *tool, 1325 union perf_event *event, 1326 struct perf_sample *sample, 1327 struct machine *machine) 1328 { 1329 int ret = -EINVAL; 1330 u64 i; 1331 1332 for (i = 0; i < sample->read.group.nr; i++) { 1333 ret = deliver_sample_value(evlist, tool, event, sample, 1334 &sample->read.group.values[i], 1335 machine); 1336 if (ret) 1337 break; 1338 } 1339 1340 return ret; 1341 } 1342 1343 static int 1344 perf_evlist__deliver_sample(struct perf_evlist *evlist, 1345 struct perf_tool *tool, 1346 union perf_event *event, 1347 struct perf_sample *sample, 1348 struct perf_evsel *evsel, 1349 struct machine *machine) 1350 { 1351 /* We know evsel != NULL. */ 1352 u64 sample_type = evsel->attr.sample_type; 1353 u64 read_format = evsel->attr.read_format; 1354 1355 /* Standard sample delivery. */ 1356 if (!(sample_type & PERF_SAMPLE_READ)) 1357 return tool->sample(tool, event, sample, evsel, machine); 1358 1359 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1360 if (read_format & PERF_FORMAT_GROUP) 1361 return deliver_sample_group(evlist, tool, event, sample, 1362 machine); 1363 else 1364 return deliver_sample_value(evlist, tool, event, sample, 1365 &sample->read.one, machine); 1366 } 1367 1368 static int machines__deliver_event(struct machines *machines, 1369 struct perf_evlist *evlist, 1370 union perf_event *event, 1371 struct perf_sample *sample, 1372 struct perf_tool *tool, u64 file_offset) 1373 { 1374 struct perf_evsel *evsel; 1375 struct machine *machine; 1376 1377 dump_event(evlist, event, file_offset, sample); 1378 1379 evsel = perf_evlist__id2evsel(evlist, sample->id); 1380 1381 machine = machines__find_for_cpumode(machines, event, sample); 1382 1383 switch (event->header.type) { 1384 case PERF_RECORD_SAMPLE: 1385 if (evsel == NULL) { 1386 ++evlist->stats.nr_unknown_id; 1387 return 0; 1388 } 1389 dump_sample(evsel, event, sample); 1390 if (machine == NULL) { 1391 ++evlist->stats.nr_unprocessable_samples; 1392 return 0; 1393 } 1394 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1395 case PERF_RECORD_MMAP: 1396 return tool->mmap(tool, event, sample, machine); 1397 case PERF_RECORD_MMAP2: 1398 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1399 ++evlist->stats.nr_proc_map_timeout; 1400 return tool->mmap2(tool, event, sample, machine); 1401 case PERF_RECORD_COMM: 1402 return tool->comm(tool, event, sample, machine); 1403 case PERF_RECORD_NAMESPACES: 1404 return tool->namespaces(tool, event, sample, machine); 1405 case PERF_RECORD_FORK: 1406 return tool->fork(tool, event, sample, machine); 1407 case PERF_RECORD_EXIT: 1408 return tool->exit(tool, event, sample, machine); 1409 case PERF_RECORD_LOST: 1410 if (tool->lost == perf_event__process_lost) 1411 evlist->stats.total_lost += event->lost.lost; 1412 return tool->lost(tool, event, sample, machine); 1413 case PERF_RECORD_LOST_SAMPLES: 1414 if (tool->lost_samples == perf_event__process_lost_samples) 1415 evlist->stats.total_lost_samples += event->lost_samples.lost; 1416 return tool->lost_samples(tool, event, sample, machine); 1417 case PERF_RECORD_READ: 1418 dump_read(evsel, event); 1419 return tool->read(tool, event, sample, evsel, machine); 1420 case PERF_RECORD_THROTTLE: 1421 return tool->throttle(tool, event, sample, machine); 1422 case PERF_RECORD_UNTHROTTLE: 1423 return tool->unthrottle(tool, event, sample, machine); 1424 case PERF_RECORD_AUX: 1425 if (tool->aux == perf_event__process_aux) { 1426 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1427 evlist->stats.total_aux_lost += 1; 1428 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1429 evlist->stats.total_aux_partial += 1; 1430 } 1431 return tool->aux(tool, event, sample, machine); 1432 case PERF_RECORD_ITRACE_START: 1433 return tool->itrace_start(tool, event, sample, machine); 1434 case PERF_RECORD_SWITCH: 1435 case PERF_RECORD_SWITCH_CPU_WIDE: 1436 return tool->context_switch(tool, event, sample, machine); 1437 case PERF_RECORD_KSYMBOL: 1438 return tool->ksymbol(tool, event, sample, machine); 1439 case PERF_RECORD_BPF_EVENT: 1440 return tool->bpf_event(tool, event, sample, machine); 1441 default: 1442 ++evlist->stats.nr_unknown_events; 1443 return -1; 1444 } 1445 } 1446 1447 static int perf_session__deliver_event(struct perf_session *session, 1448 union perf_event *event, 1449 struct perf_tool *tool, 1450 u64 file_offset) 1451 { 1452 struct perf_sample sample; 1453 int ret; 1454 1455 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1456 if (ret) { 1457 pr_err("Can't parse sample, err = %d\n", ret); 1458 return ret; 1459 } 1460 1461 ret = auxtrace__process_event(session, event, &sample, tool); 1462 if (ret < 0) 1463 return ret; 1464 if (ret > 0) 1465 return 0; 1466 1467 return machines__deliver_event(&session->machines, session->evlist, 1468 event, &sample, tool, file_offset); 1469 } 1470 1471 static s64 perf_session__process_user_event(struct perf_session *session, 1472 union perf_event *event, 1473 u64 file_offset) 1474 { 1475 struct ordered_events *oe = &session->ordered_events; 1476 struct perf_tool *tool = session->tool; 1477 struct perf_sample sample = { .time = 0, }; 1478 int fd = perf_data__fd(session->data); 1479 int err; 1480 1481 if (event->header.type != PERF_RECORD_COMPRESSED || 1482 tool->compressed == perf_session__process_compressed_event_stub) 1483 dump_event(session->evlist, event, file_offset, &sample); 1484 1485 /* These events are processed right away */ 1486 switch (event->header.type) { 1487 case PERF_RECORD_HEADER_ATTR: 1488 err = tool->attr(tool, event, &session->evlist); 1489 if (err == 0) { 1490 perf_session__set_id_hdr_size(session); 1491 perf_session__set_comm_exec(session); 1492 } 1493 return err; 1494 case PERF_RECORD_EVENT_UPDATE: 1495 return tool->event_update(tool, event, &session->evlist); 1496 case PERF_RECORD_HEADER_EVENT_TYPE: 1497 /* 1498 * Depreceated, but we need to handle it for sake 1499 * of old data files create in pipe mode. 1500 */ 1501 return 0; 1502 case PERF_RECORD_HEADER_TRACING_DATA: 1503 /* setup for reading amidst mmap */ 1504 lseek(fd, file_offset, SEEK_SET); 1505 return tool->tracing_data(session, event); 1506 case PERF_RECORD_HEADER_BUILD_ID: 1507 return tool->build_id(session, event); 1508 case PERF_RECORD_FINISHED_ROUND: 1509 return tool->finished_round(tool, event, oe); 1510 case PERF_RECORD_ID_INDEX: 1511 return tool->id_index(session, event); 1512 case PERF_RECORD_AUXTRACE_INFO: 1513 return tool->auxtrace_info(session, event); 1514 case PERF_RECORD_AUXTRACE: 1515 /* setup for reading amidst mmap */ 1516 lseek(fd, file_offset + event->header.size, SEEK_SET); 1517 return tool->auxtrace(session, event); 1518 case PERF_RECORD_AUXTRACE_ERROR: 1519 perf_session__auxtrace_error_inc(session, event); 1520 return tool->auxtrace_error(session, event); 1521 case PERF_RECORD_THREAD_MAP: 1522 return tool->thread_map(session, event); 1523 case PERF_RECORD_CPU_MAP: 1524 return tool->cpu_map(session, event); 1525 case PERF_RECORD_STAT_CONFIG: 1526 return tool->stat_config(session, event); 1527 case PERF_RECORD_STAT: 1528 return tool->stat(session, event); 1529 case PERF_RECORD_STAT_ROUND: 1530 return tool->stat_round(session, event); 1531 case PERF_RECORD_TIME_CONV: 1532 session->time_conv = event->time_conv; 1533 return tool->time_conv(session, event); 1534 case PERF_RECORD_HEADER_FEATURE: 1535 return tool->feature(session, event); 1536 case PERF_RECORD_COMPRESSED: 1537 err = tool->compressed(session, event, file_offset); 1538 if (err) 1539 dump_event(session->evlist, event, file_offset, &sample); 1540 return err; 1541 default: 1542 return -EINVAL; 1543 } 1544 } 1545 1546 int perf_session__deliver_synth_event(struct perf_session *session, 1547 union perf_event *event, 1548 struct perf_sample *sample) 1549 { 1550 struct perf_evlist *evlist = session->evlist; 1551 struct perf_tool *tool = session->tool; 1552 1553 events_stats__inc(&evlist->stats, event->header.type); 1554 1555 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1556 return perf_session__process_user_event(session, event, 0); 1557 1558 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1559 } 1560 1561 static void event_swap(union perf_event *event, bool sample_id_all) 1562 { 1563 perf_event__swap_op swap; 1564 1565 swap = perf_event__swap_ops[event->header.type]; 1566 if (swap) 1567 swap(event, sample_id_all); 1568 } 1569 1570 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1571 void *buf, size_t buf_sz, 1572 union perf_event **event_ptr, 1573 struct perf_sample *sample) 1574 { 1575 union perf_event *event; 1576 size_t hdr_sz, rest; 1577 int fd; 1578 1579 if (session->one_mmap && !session->header.needs_swap) { 1580 event = file_offset - session->one_mmap_offset + 1581 session->one_mmap_addr; 1582 goto out_parse_sample; 1583 } 1584 1585 if (perf_data__is_pipe(session->data)) 1586 return -1; 1587 1588 fd = perf_data__fd(session->data); 1589 hdr_sz = sizeof(struct perf_event_header); 1590 1591 if (buf_sz < hdr_sz) 1592 return -1; 1593 1594 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1595 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1596 return -1; 1597 1598 event = (union perf_event *)buf; 1599 1600 if (session->header.needs_swap) 1601 perf_event_header__bswap(&event->header); 1602 1603 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1604 return -1; 1605 1606 rest = event->header.size - hdr_sz; 1607 1608 if (readn(fd, buf, rest) != (ssize_t)rest) 1609 return -1; 1610 1611 if (session->header.needs_swap) 1612 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1613 1614 out_parse_sample: 1615 1616 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1617 perf_evlist__parse_sample(session->evlist, event, sample)) 1618 return -1; 1619 1620 *event_ptr = event; 1621 1622 return 0; 1623 } 1624 1625 static s64 perf_session__process_event(struct perf_session *session, 1626 union perf_event *event, u64 file_offset) 1627 { 1628 struct perf_evlist *evlist = session->evlist; 1629 struct perf_tool *tool = session->tool; 1630 int ret; 1631 1632 if (session->header.needs_swap) 1633 event_swap(event, perf_evlist__sample_id_all(evlist)); 1634 1635 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1636 return -EINVAL; 1637 1638 events_stats__inc(&evlist->stats, event->header.type); 1639 1640 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1641 return perf_session__process_user_event(session, event, file_offset); 1642 1643 if (tool->ordered_events) { 1644 u64 timestamp = -1ULL; 1645 1646 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); 1647 if (ret && ret != -1) 1648 return ret; 1649 1650 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1651 if (ret != -ETIME) 1652 return ret; 1653 } 1654 1655 return perf_session__deliver_event(session, event, tool, file_offset); 1656 } 1657 1658 void perf_event_header__bswap(struct perf_event_header *hdr) 1659 { 1660 hdr->type = bswap_32(hdr->type); 1661 hdr->misc = bswap_16(hdr->misc); 1662 hdr->size = bswap_16(hdr->size); 1663 } 1664 1665 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1666 { 1667 return machine__findnew_thread(&session->machines.host, -1, pid); 1668 } 1669 1670 /* 1671 * Threads are identified by pid and tid, and the idle task has pid == tid == 0. 1672 * So here a single thread is created for that, but actually there is a separate 1673 * idle task per cpu, so there should be one 'struct thread' per cpu, but there 1674 * is only 1. That causes problems for some tools, requiring workarounds. For 1675 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). 1676 */ 1677 int perf_session__register_idle_thread(struct perf_session *session) 1678 { 1679 struct thread *thread; 1680 int err = 0; 1681 1682 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1683 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1684 pr_err("problem inserting idle task.\n"); 1685 err = -1; 1686 } 1687 1688 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1689 pr_err("problem inserting idle task.\n"); 1690 err = -1; 1691 } 1692 1693 /* machine__findnew_thread() got the thread, so put it */ 1694 thread__put(thread); 1695 return err; 1696 } 1697 1698 static void 1699 perf_session__warn_order(const struct perf_session *session) 1700 { 1701 const struct ordered_events *oe = &session->ordered_events; 1702 struct perf_evsel *evsel; 1703 bool should_warn = true; 1704 1705 evlist__for_each_entry(session->evlist, evsel) { 1706 if (evsel->attr.write_backward) 1707 should_warn = false; 1708 } 1709 1710 if (!should_warn) 1711 return; 1712 if (oe->nr_unordered_events != 0) 1713 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1714 } 1715 1716 static void perf_session__warn_about_errors(const struct perf_session *session) 1717 { 1718 const struct events_stats *stats = &session->evlist->stats; 1719 1720 if (session->tool->lost == perf_event__process_lost && 1721 stats->nr_events[PERF_RECORD_LOST] != 0) { 1722 ui__warning("Processed %d events and lost %d chunks!\n\n" 1723 "Check IO/CPU overload!\n\n", 1724 stats->nr_events[0], 1725 stats->nr_events[PERF_RECORD_LOST]); 1726 } 1727 1728 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1729 double drop_rate; 1730 1731 drop_rate = (double)stats->total_lost_samples / 1732 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1733 if (drop_rate > 0.05) { 1734 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1735 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1736 drop_rate * 100.0); 1737 } 1738 } 1739 1740 if (session->tool->aux == perf_event__process_aux && 1741 stats->total_aux_lost != 0) { 1742 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1743 stats->total_aux_lost, 1744 stats->nr_events[PERF_RECORD_AUX]); 1745 } 1746 1747 if (session->tool->aux == perf_event__process_aux && 1748 stats->total_aux_partial != 0) { 1749 bool vmm_exclusive = false; 1750 1751 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1752 &vmm_exclusive); 1753 1754 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1755 "Are you running a KVM guest in the background?%s\n\n", 1756 stats->total_aux_partial, 1757 stats->nr_events[PERF_RECORD_AUX], 1758 vmm_exclusive ? 1759 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1760 "will reduce the gaps to only guest's timeslices." : 1761 ""); 1762 } 1763 1764 if (stats->nr_unknown_events != 0) { 1765 ui__warning("Found %u unknown events!\n\n" 1766 "Is this an older tool processing a perf.data " 1767 "file generated by a more recent tool?\n\n" 1768 "If that is not the case, consider " 1769 "reporting to linux-kernel@vger.kernel.org.\n\n", 1770 stats->nr_unknown_events); 1771 } 1772 1773 if (stats->nr_unknown_id != 0) { 1774 ui__warning("%u samples with id not present in the header\n", 1775 stats->nr_unknown_id); 1776 } 1777 1778 if (stats->nr_invalid_chains != 0) { 1779 ui__warning("Found invalid callchains!\n\n" 1780 "%u out of %u events were discarded for this reason.\n\n" 1781 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1782 stats->nr_invalid_chains, 1783 stats->nr_events[PERF_RECORD_SAMPLE]); 1784 } 1785 1786 if (stats->nr_unprocessable_samples != 0) { 1787 ui__warning("%u unprocessable samples recorded.\n" 1788 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1789 stats->nr_unprocessable_samples); 1790 } 1791 1792 perf_session__warn_order(session); 1793 1794 events_stats__auxtrace_error_warn(stats); 1795 1796 if (stats->nr_proc_map_timeout != 0) { 1797 ui__warning("%d map information files for pre-existing threads were\n" 1798 "not processed, if there are samples for addresses they\n" 1799 "will not be resolved, you may find out which are these\n" 1800 "threads by running with -v and redirecting the output\n" 1801 "to a file.\n" 1802 "The time limit to process proc map is too short?\n" 1803 "Increase it by --proc-map-timeout\n", 1804 stats->nr_proc_map_timeout); 1805 } 1806 } 1807 1808 static int perf_session__flush_thread_stack(struct thread *thread, 1809 void *p __maybe_unused) 1810 { 1811 return thread_stack__flush(thread); 1812 } 1813 1814 static int perf_session__flush_thread_stacks(struct perf_session *session) 1815 { 1816 return machines__for_each_thread(&session->machines, 1817 perf_session__flush_thread_stack, 1818 NULL); 1819 } 1820 1821 volatile int session_done; 1822 1823 static int __perf_session__process_decomp_events(struct perf_session *session); 1824 1825 static int __perf_session__process_pipe_events(struct perf_session *session) 1826 { 1827 struct ordered_events *oe = &session->ordered_events; 1828 struct perf_tool *tool = session->tool; 1829 int fd = perf_data__fd(session->data); 1830 union perf_event *event; 1831 uint32_t size, cur_size = 0; 1832 void *buf = NULL; 1833 s64 skip = 0; 1834 u64 head; 1835 ssize_t err; 1836 void *p; 1837 1838 perf_tool__fill_defaults(tool); 1839 1840 head = 0; 1841 cur_size = sizeof(union perf_event); 1842 1843 buf = malloc(cur_size); 1844 if (!buf) 1845 return -errno; 1846 ordered_events__set_copy_on_queue(oe, true); 1847 more: 1848 event = buf; 1849 err = readn(fd, event, sizeof(struct perf_event_header)); 1850 if (err <= 0) { 1851 if (err == 0) 1852 goto done; 1853 1854 pr_err("failed to read event header\n"); 1855 goto out_err; 1856 } 1857 1858 if (session->header.needs_swap) 1859 perf_event_header__bswap(&event->header); 1860 1861 size = event->header.size; 1862 if (size < sizeof(struct perf_event_header)) { 1863 pr_err("bad event header size\n"); 1864 goto out_err; 1865 } 1866 1867 if (size > cur_size) { 1868 void *new = realloc(buf, size); 1869 if (!new) { 1870 pr_err("failed to allocate memory to read event\n"); 1871 goto out_err; 1872 } 1873 buf = new; 1874 cur_size = size; 1875 event = buf; 1876 } 1877 p = event; 1878 p += sizeof(struct perf_event_header); 1879 1880 if (size - sizeof(struct perf_event_header)) { 1881 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1882 if (err <= 0) { 1883 if (err == 0) { 1884 pr_err("unexpected end of event stream\n"); 1885 goto done; 1886 } 1887 1888 pr_err("failed to read event data\n"); 1889 goto out_err; 1890 } 1891 } 1892 1893 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1894 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1895 head, event->header.size, event->header.type); 1896 err = -EINVAL; 1897 goto out_err; 1898 } 1899 1900 head += size; 1901 1902 if (skip > 0) 1903 head += skip; 1904 1905 err = __perf_session__process_decomp_events(session); 1906 if (err) 1907 goto out_err; 1908 1909 if (!session_done()) 1910 goto more; 1911 done: 1912 /* do the final flush for ordered samples */ 1913 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1914 if (err) 1915 goto out_err; 1916 err = auxtrace__flush_events(session, tool); 1917 if (err) 1918 goto out_err; 1919 err = perf_session__flush_thread_stacks(session); 1920 out_err: 1921 free(buf); 1922 if (!tool->no_warn) 1923 perf_session__warn_about_errors(session); 1924 ordered_events__free(&session->ordered_events); 1925 auxtrace__free_events(session); 1926 return err; 1927 } 1928 1929 static union perf_event * 1930 fetch_mmaped_event(struct perf_session *session, 1931 u64 head, size_t mmap_size, char *buf) 1932 { 1933 union perf_event *event; 1934 1935 /* 1936 * Ensure we have enough space remaining to read 1937 * the size of the event in the headers. 1938 */ 1939 if (head + sizeof(event->header) > mmap_size) 1940 return NULL; 1941 1942 event = (union perf_event *)(buf + head); 1943 1944 if (session->header.needs_swap) 1945 perf_event_header__bswap(&event->header); 1946 1947 if (head + event->header.size > mmap_size) { 1948 /* We're not fetching the event so swap back again */ 1949 if (session->header.needs_swap) 1950 perf_event_header__bswap(&event->header); 1951 return NULL; 1952 } 1953 1954 return event; 1955 } 1956 1957 static int __perf_session__process_decomp_events(struct perf_session *session) 1958 { 1959 s64 skip; 1960 u64 size, file_pos = 0; 1961 struct decomp *decomp = session->decomp_last; 1962 1963 if (!decomp) 1964 return 0; 1965 1966 while (decomp->head < decomp->size && !session_done()) { 1967 union perf_event *event = fetch_mmaped_event(session, decomp->head, decomp->size, decomp->data); 1968 1969 if (!event) 1970 break; 1971 1972 size = event->header.size; 1973 1974 if (size < sizeof(struct perf_event_header) || 1975 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1976 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1977 decomp->file_pos + decomp->head, event->header.size, event->header.type); 1978 return -EINVAL; 1979 } 1980 1981 if (skip) 1982 size += skip; 1983 1984 decomp->head += size; 1985 } 1986 1987 return 0; 1988 } 1989 1990 /* 1991 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1992 * slices. On 32bit we use 32MB. 1993 */ 1994 #if BITS_PER_LONG == 64 1995 #define MMAP_SIZE ULLONG_MAX 1996 #define NUM_MMAPS 1 1997 #else 1998 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1999 #define NUM_MMAPS 128 2000 #endif 2001 2002 struct reader; 2003 2004 typedef s64 (*reader_cb_t)(struct perf_session *session, 2005 union perf_event *event, 2006 u64 file_offset); 2007 2008 struct reader { 2009 int fd; 2010 u64 data_size; 2011 u64 data_offset; 2012 reader_cb_t process; 2013 }; 2014 2015 static int 2016 reader__process_events(struct reader *rd, struct perf_session *session, 2017 struct ui_progress *prog) 2018 { 2019 u64 data_size = rd->data_size; 2020 u64 head, page_offset, file_offset, file_pos, size; 2021 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 2022 size_t mmap_size; 2023 char *buf, *mmaps[NUM_MMAPS]; 2024 union perf_event *event; 2025 s64 skip; 2026 2027 page_offset = page_size * (rd->data_offset / page_size); 2028 file_offset = page_offset; 2029 head = rd->data_offset - page_offset; 2030 2031 ui_progress__init_size(prog, data_size, "Processing events..."); 2032 2033 data_size += rd->data_offset; 2034 2035 mmap_size = MMAP_SIZE; 2036 if (mmap_size > data_size) { 2037 mmap_size = data_size; 2038 session->one_mmap = true; 2039 } 2040 2041 memset(mmaps, 0, sizeof(mmaps)); 2042 2043 mmap_prot = PROT_READ; 2044 mmap_flags = MAP_SHARED; 2045 2046 if (session->header.needs_swap) { 2047 mmap_prot |= PROT_WRITE; 2048 mmap_flags = MAP_PRIVATE; 2049 } 2050 remap: 2051 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 2052 file_offset); 2053 if (buf == MAP_FAILED) { 2054 pr_err("failed to mmap file\n"); 2055 err = -errno; 2056 goto out; 2057 } 2058 mmaps[map_idx] = buf; 2059 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 2060 file_pos = file_offset + head; 2061 if (session->one_mmap) { 2062 session->one_mmap_addr = buf; 2063 session->one_mmap_offset = file_offset; 2064 } 2065 2066 more: 2067 event = fetch_mmaped_event(session, head, mmap_size, buf); 2068 if (!event) { 2069 if (mmaps[map_idx]) { 2070 munmap(mmaps[map_idx], mmap_size); 2071 mmaps[map_idx] = NULL; 2072 } 2073 2074 page_offset = page_size * (head / page_size); 2075 file_offset += page_offset; 2076 head -= page_offset; 2077 goto remap; 2078 } 2079 2080 size = event->header.size; 2081 2082 skip = -EINVAL; 2083 2084 if (size < sizeof(struct perf_event_header) || 2085 (skip = rd->process(session, event, file_pos)) < 0) { 2086 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2087 file_offset + head, event->header.size, 2088 event->header.type, strerror(-skip)); 2089 err = skip; 2090 goto out; 2091 } 2092 2093 if (skip) 2094 size += skip; 2095 2096 head += size; 2097 file_pos += size; 2098 2099 err = __perf_session__process_decomp_events(session); 2100 if (err) 2101 goto out; 2102 2103 ui_progress__update(prog, size); 2104 2105 if (session_done()) 2106 goto out; 2107 2108 if (file_pos < data_size) 2109 goto more; 2110 2111 out: 2112 return err; 2113 } 2114 2115 static s64 process_simple(struct perf_session *session, 2116 union perf_event *event, 2117 u64 file_offset) 2118 { 2119 return perf_session__process_event(session, event, file_offset); 2120 } 2121 2122 static int __perf_session__process_events(struct perf_session *session) 2123 { 2124 struct reader rd = { 2125 .fd = perf_data__fd(session->data), 2126 .data_size = session->header.data_size, 2127 .data_offset = session->header.data_offset, 2128 .process = process_simple, 2129 }; 2130 struct ordered_events *oe = &session->ordered_events; 2131 struct perf_tool *tool = session->tool; 2132 struct ui_progress prog; 2133 int err; 2134 2135 perf_tool__fill_defaults(tool); 2136 2137 if (rd.data_size == 0) 2138 return -1; 2139 2140 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2141 2142 err = reader__process_events(&rd, session, &prog); 2143 if (err) 2144 goto out_err; 2145 /* do the final flush for ordered samples */ 2146 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2147 if (err) 2148 goto out_err; 2149 err = auxtrace__flush_events(session, tool); 2150 if (err) 2151 goto out_err; 2152 err = perf_session__flush_thread_stacks(session); 2153 out_err: 2154 ui_progress__finish(); 2155 if (!tool->no_warn) 2156 perf_session__warn_about_errors(session); 2157 /* 2158 * We may switching perf.data output, make ordered_events 2159 * reusable. 2160 */ 2161 ordered_events__reinit(&session->ordered_events); 2162 auxtrace__free_events(session); 2163 session->one_mmap = false; 2164 return err; 2165 } 2166 2167 int perf_session__process_events(struct perf_session *session) 2168 { 2169 if (perf_session__register_idle_thread(session) < 0) 2170 return -ENOMEM; 2171 2172 if (perf_data__is_pipe(session->data)) 2173 return __perf_session__process_pipe_events(session); 2174 2175 return __perf_session__process_events(session); 2176 } 2177 2178 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2179 { 2180 struct perf_evsel *evsel; 2181 2182 evlist__for_each_entry(session->evlist, evsel) { 2183 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 2184 return true; 2185 } 2186 2187 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2188 return false; 2189 } 2190 2191 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2192 { 2193 char *bracket; 2194 struct ref_reloc_sym *ref; 2195 struct kmap *kmap; 2196 2197 ref = zalloc(sizeof(struct ref_reloc_sym)); 2198 if (ref == NULL) 2199 return -ENOMEM; 2200 2201 ref->name = strdup(symbol_name); 2202 if (ref->name == NULL) { 2203 free(ref); 2204 return -ENOMEM; 2205 } 2206 2207 bracket = strchr(ref->name, ']'); 2208 if (bracket) 2209 *bracket = '\0'; 2210 2211 ref->addr = addr; 2212 2213 kmap = map__kmap(map); 2214 if (kmap) 2215 kmap->ref_reloc_sym = ref; 2216 2217 return 0; 2218 } 2219 2220 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2221 { 2222 return machines__fprintf_dsos(&session->machines, fp); 2223 } 2224 2225 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2226 bool (skip)(struct dso *dso, int parm), int parm) 2227 { 2228 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2229 } 2230 2231 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2232 { 2233 size_t ret; 2234 const char *msg = ""; 2235 2236 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2237 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2238 2239 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2240 2241 ret += events_stats__fprintf(&session->evlist->stats, fp); 2242 return ret; 2243 } 2244 2245 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2246 { 2247 /* 2248 * FIXME: Here we have to actually print all the machines in this 2249 * session, not just the host... 2250 */ 2251 return machine__fprintf(&session->machines.host, fp); 2252 } 2253 2254 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 2255 unsigned int type) 2256 { 2257 struct perf_evsel *pos; 2258 2259 evlist__for_each_entry(session->evlist, pos) { 2260 if (pos->attr.type == type) 2261 return pos; 2262 } 2263 return NULL; 2264 } 2265 2266 int perf_session__cpu_bitmap(struct perf_session *session, 2267 const char *cpu_list, unsigned long *cpu_bitmap) 2268 { 2269 int i, err = -1; 2270 struct cpu_map *map; 2271 2272 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2273 struct perf_evsel *evsel; 2274 2275 evsel = perf_session__find_first_evtype(session, i); 2276 if (!evsel) 2277 continue; 2278 2279 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 2280 pr_err("File does not contain CPU events. " 2281 "Remove -C option to proceed.\n"); 2282 return -1; 2283 } 2284 } 2285 2286 map = cpu_map__new(cpu_list); 2287 if (map == NULL) { 2288 pr_err("Invalid cpu_list\n"); 2289 return -1; 2290 } 2291 2292 for (i = 0; i < map->nr; i++) { 2293 int cpu = map->map[i]; 2294 2295 if (cpu >= MAX_NR_CPUS) { 2296 pr_err("Requested CPU %d too large. " 2297 "Consider raising MAX_NR_CPUS\n", cpu); 2298 goto out_delete_map; 2299 } 2300 2301 set_bit(cpu, cpu_bitmap); 2302 } 2303 2304 err = 0; 2305 2306 out_delete_map: 2307 cpu_map__put(map); 2308 return err; 2309 } 2310 2311 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2312 bool full) 2313 { 2314 if (session == NULL || fp == NULL) 2315 return; 2316 2317 fprintf(fp, "# ========\n"); 2318 perf_header__fprintf_info(session, fp, full); 2319 fprintf(fp, "# ========\n#\n"); 2320 } 2321 2322 2323 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2324 const struct perf_evsel_str_handler *assocs, 2325 size_t nr_assocs) 2326 { 2327 struct perf_evsel *evsel; 2328 size_t i; 2329 int err; 2330 2331 for (i = 0; i < nr_assocs; i++) { 2332 /* 2333 * Adding a handler for an event not in the session, 2334 * just ignore it. 2335 */ 2336 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2337 if (evsel == NULL) 2338 continue; 2339 2340 err = -EEXIST; 2341 if (evsel->handler != NULL) 2342 goto out; 2343 evsel->handler = assocs[i].handler; 2344 } 2345 2346 err = 0; 2347 out: 2348 return err; 2349 } 2350 2351 int perf_event__process_id_index(struct perf_session *session, 2352 union perf_event *event) 2353 { 2354 struct perf_evlist *evlist = session->evlist; 2355 struct id_index_event *ie = &event->id_index; 2356 size_t i, nr, max_nr; 2357 2358 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2359 sizeof(struct id_index_entry); 2360 nr = ie->nr; 2361 if (nr > max_nr) 2362 return -EINVAL; 2363 2364 if (dump_trace) 2365 fprintf(stdout, " nr: %zu\n", nr); 2366 2367 for (i = 0; i < nr; i++) { 2368 struct id_index_entry *e = &ie->entries[i]; 2369 struct perf_sample_id *sid; 2370 2371 if (dump_trace) { 2372 fprintf(stdout, " ... id: %"PRIu64, e->id); 2373 fprintf(stdout, " idx: %"PRIu64, e->idx); 2374 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2375 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2376 } 2377 2378 sid = perf_evlist__id2sid(evlist, e->id); 2379 if (!sid) 2380 return -ENOENT; 2381 sid->idx = e->idx; 2382 sid->cpu = e->cpu; 2383 sid->tid = e->tid; 2384 } 2385 return 0; 2386 } 2387 2388 int perf_event__synthesize_id_index(struct perf_tool *tool, 2389 perf_event__handler_t process, 2390 struct perf_evlist *evlist, 2391 struct machine *machine) 2392 { 2393 union perf_event *ev; 2394 struct perf_evsel *evsel; 2395 size_t nr = 0, i = 0, sz, max_nr, n; 2396 int err; 2397 2398 pr_debug2("Synthesizing id index\n"); 2399 2400 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2401 sizeof(struct id_index_entry); 2402 2403 evlist__for_each_entry(evlist, evsel) 2404 nr += evsel->ids; 2405 2406 n = nr > max_nr ? max_nr : nr; 2407 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2408 ev = zalloc(sz); 2409 if (!ev) 2410 return -ENOMEM; 2411 2412 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2413 ev->id_index.header.size = sz; 2414 ev->id_index.nr = n; 2415 2416 evlist__for_each_entry(evlist, evsel) { 2417 u32 j; 2418 2419 for (j = 0; j < evsel->ids; j++) { 2420 struct id_index_entry *e; 2421 struct perf_sample_id *sid; 2422 2423 if (i >= n) { 2424 err = process(tool, ev, NULL, machine); 2425 if (err) 2426 goto out_err; 2427 nr -= n; 2428 i = 0; 2429 } 2430 2431 e = &ev->id_index.entries[i++]; 2432 2433 e->id = evsel->id[j]; 2434 2435 sid = perf_evlist__id2sid(evlist, e->id); 2436 if (!sid) { 2437 free(ev); 2438 return -ENOENT; 2439 } 2440 2441 e->idx = sid->idx; 2442 e->cpu = sid->cpu; 2443 e->tid = sid->tid; 2444 } 2445 } 2446 2447 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2448 ev->id_index.header.size = sz; 2449 ev->id_index.nr = nr; 2450 2451 err = process(tool, ev, NULL, machine); 2452 out_err: 2453 free(ev); 2454 2455 return err; 2456 } 2457